CN1107550A

CN1107550A - Device for feeding liquid under pressure

Info

Publication number: CN1107550A
Application number: CN94102907A
Authority: CN
Inventors: 汤本秀昭
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 1993-03-17
Filing date: 1994-03-16
Publication date: 1995-08-30
Also published as: US5445501A; TW274115B; KR940021982A; ES2109531T3; AU656872B2; AU5765794A; BR9400858A; NO940951L; EP0620394A1; KR0157475B1; NO940951D0; DE69406172T2; DE69406172D1; CA2118684A1; CA2118684C; DK0620394T3; EP0620394B1

Abstract

A device for feeding liquid under pressure comprises a vessel having an operating fluid inlet, an operating fluid outlet, an inlet opening and an outlet opening for the liquid to be fed under pressure; a float disposed within said vessel; a change-over valve for alternately switching the operations of opening and closing the operating fluid inlet and outlet in response to the movement of the float; and a link mechanism. The link mechanism comprises a valve operating rod connected to the change-over valve and a compression spring supported at one end thereof by the valve operating rod and adapted not to cross any fulcrum at the time of operation thereof, and operates to move the valve operating rod in a snap motion in response to the movement of the float. The compression spring is supported by the valve operating rod so that the vector of action of the compression spring passes onto the point connecting the compression spring with the valve operating rod.

Description

Device for feeding liquid under pressure

The present invention relates to the device for feeding liquid under pressure of liquid such as force feed water or fuel.Device for feeding liquid under pressure of the present invention is particularly suitable for being collected in the condensed fluid that produces in the inherent steam pipe system one period and this condensed fluid is delivered to boiler or certain utilizes the equipment of used heat.

The condensed fluid that great majority produce in steam pipe system still contains suitable heat.In order effectively to utilize this energy, a kind of liquid recovery system of extensive use in this reclaiming system, adopts a kind of device for feeding liquid under pressure to reclaim condensed fluid, then condensed fluid is delivered to boiler or certain used heat utilized device, effectively utilizes these used heat.

The effect of used device for feeding liquid under pressure is in this condensed fluid reclaiming system, in one period, condensed fluid is collected in the seal container, then the switch transition valve with pressurized working fluid for example steam etc. be incorporated in this seal container, utilize the pressure of working fluid, force the condensed fluid in the seal container to be discharged.

For operating liquid force feed device expeditiously, need in seal container, accumulate many condensed fluids as far as possible, and, introduce pressurized working fluid at switch transition valve reliably of suitable time.

Therefore in most liquid force feed device, generally all adopt quick-acting mechanism to change changing valve reliably so far with disc spring.Wherein adopt the device for feeding liquid under pressure of disc spring open in U.S. Patent No. 5 141 405.

Fig. 5 illustrates the quick-acting mechanism in the device for feeding liquid under pressure.This quick-acting mechanism 100 is made up of the disc spring 103 of float lever 101, auxiliary rod 102 and compression.Float lever 101 usefulness pins 106 are contained on the bearing support 105 so that carry out oscillating motion, then are fixed on the front end of float lever 101 at the float 108 of opposition side.

For carrying out oscillating motion, an end of auxiliary rod 102 then is connected on the end of disc spring 103 with pin with the other end that the same pin 110,106 of adorning float lever 101 is connected auxiliary rod on the bearing support 105.Valve-operating lever 111 usefulness pins 107 are connected on the core of auxiliary rod 102.Valve-operating lever 111 is connected on as shown in Figure 6 the changing valve 120.Promptly the driveshaft 121 in changing valve 120 bottoms is connected on the valve-operating lever 111.Driveshaft 121 and valve-operating lever 111 can be same parts.

Changing valve 120 comprises gas access valve 122 and gas outlet valve 123, and along with valve-operating lever 111 moves upward, this inlet valve and outlet valve are opened and closed respectively.Spherical gas inlet valve body 124 is configured in the gas access valve 122, and plate shaped gas outlet valve body 125 then is configured in the gas outlet valve 123, and above-mentioned valve body all is connected on the driveshaft 121.

Referring to Fig. 5, the end away from auxiliary rod 102 of disc spring 103 is connected on the float lever 101 with pin 112.In device for feeding liquid under pressure, when condensed fluid accumulated in the seal container (not shown), spring support 115 also raise with the rising of float 108.Yet, because the gas outlet valve body of changing valve 120 125 is in the closed position by the effect of valve-operating lever 111 and driveshaft, again because fixing pin 106 is arranged, so auxiliary rod 102 still is in same position, thereby spring support 116 pivots, and disc spring 103 compressive deformations.The reaction force that produces owing to the compressive deformation of disc spring 103 acts on the pin 110 by this way, that is, sub-arm 102 is clockwise rotated around pivot.

Float 108 further rises and causes that disc spring 103 overlaps point-blank with auxiliary rod 120.Subsequently, when further rising and disc spring 103 when surpassing 180 ° with auxiliary rod 102 angulations in the position of spring support 115, the reaction force that is produced by disc spring 103 compressive deformations just acts on the pin 110 by this way, that is, sub-arm 102 is rotated around the pivot inhour.The result, disc spring 103 returns to its original shape in moment, attachment portion between disc spring 103 and the auxiliary rod 102 (pin 110) moves down in the quick-action mode, thereby by valve-operating lever 111 changing valve 120 is moved down, like this in the very short time internal conversion valve.

This device for feeding liquid under pressure can with simple structure and preferably efficient liquid is transmitted under pressure.Yet the parts such as pin that valve-operating lever 111 is installed are easy to damage.

Promptly, in the device for feeding liquid under pressure of routine, because valve-operating lever 111 is suitable for moving up and down with pin 106 fulcrum that rotates, so when the quick-action conversion operations takes place, moment of rotation just acts on some part of this pin 106 or mount pin 107, thereby easy to wear.

In addition, the structure of changing valve 120 is when making a valve in gas access and the outlet valve mechanism close, another valve is opened, concern as can be seen from the position of two valves 122,123 shown in Figure 6 and driveshaft 121, driveshaft 121 can not bear the impact that produces when the switch transition valve 120 along its central axis, 107 rotates with respect to pin is installed but the effect of driveshaft 121 and relevant valve-operating lever 111 makes its axis.The result.Pin 107 and valve-operating lever 111 be even contact each other, and pin 107 bears eccentric wear and decreases, and is damaged.

When the wearing and tearing increase of pin 106, when pin 107 is damaged, just switch transition valve 120 and force feed fluid reliably effectively.

Therefore the objective of the invention is to be conceived to the problem of above-mentioned prior art, a kind of device for feeding liquid under pressure is provided, in this device, connect the connecting pin of valve-operating lever and quick-acting mechanism and be difficult for sustaining damage as the pin of conversion fulcrum, the advantage of this device is that the life-span is long.

For addressing the above problem, the invention provides a kind of device for feeding liquid under pressure, this device comprises container, float, changing valve and linkage mechanism, this container has the outlet of Working-fluid intaking, working fluid, treat the inlet of force feed liquid and treat the outlet of force feed liquid; This float is configured in the said vesse; The motion of this changing valve responsive float alternately opens and closes the entrance and exit of working fluid; This linkage mechanism comprises valve-operating lever and pressure spring that is connected on the changing valve, and an end of this spring is supported by valve-operating lever, and this spring does not cross any fulcrum when operation.The motion of aforementioned link mechanism responsive float makes valve-operating lever do the snap-type motion.Above-mentioned pressure spring is supported by valve-operating lever, makes the tie point of force vector by pressure spring and valve-operating lever of pressure spring.

For the technological means of the present invention that reaches above-mentioned technical purpose and provide is that in the device for feeding liquid under pressure of said structure, pressure spring is supported by valve-operating lever, make the tie point of force vector by pressure spring and valve-operating lever of pressure spring.

Linkage mechanism preferably includes (ⅰ) and is connected valve-operating lever on the changing valve; (ⅱ) with the controlling rod of the direction swing of the reverse movement of float; (ⅲ) pressure spring, an end of this spring is by the end bearing away from swing fulcrum of this controlling rod, and its other end is supported by valve-operating lever, and this spring is compressed between controlling rod and the valve-operating lever, makes controlling rod become extended state.

Also have, for ease of the switch transition valve, preferably by many guiding element guiding, these guiding elements have the part of the impact force that produces in the time of can accepting the changing valve switching to valve-operating lever.

Device for feeding liquid under pressure of the present invention is similar to well-known device part and is, is accompanied by the increase for the treatment of the force feed amount of liquid collected, the float motion, this causes the motion of pressure spring snap-type, thereby the switch transition valve, pressurized working fluid is incorporated in the seal container, thus the liquid that force feed is collected.But because the impact force that produces when quick-action is switched is dispersed on three fulcrums of quick-acting mechanism, again because on any one fulcrum, do not rotate square basically, so the life-span of each fulcrum has all prolonged.In addition because the valve-operating lever in device for feeding liquid under pressure is led by the many guiding elements that are arranged on its side, the mount pin that quick-acting mechanism is contained on the valve-operating lever make the motion path of valve-operating lever can not be offset, so can not be subjected to the effect that eccentric wear decreases when the switch transition valve.

From below in conjunction with the description of the drawings other features and advantages of the present invention as can be seen.

Fig. 1 is an embodiment's of a device for feeding liquid under pressure of the present invention sectional view;

Fig. 2 is the sectional view along the M-M line intercepting of Fig. 1;

Fig. 3 is the sectional view along the N-N line intercepting of Fig. 1;

Fig. 4 is a detailed sectional view, is illustrated in the attachment portion of pressure spring and valve-operating lever in the device for feeding liquid under pressure shown in Figure 1;

Fig. 5 is the part zoomed-in view of the employed quick-acting mechanism of device for feeding liquid under pressure in the prior art;

Fig. 6 is the amplification sectional view of the used changing valve of the device for feeding liquid under pressure of prior art.

The accompanying drawing of the embodiment of the invention is shown with method reference for example below, describes the present invention in detail.

With reference to Fig. 1, device for feeding liquid under pressure 1 comprises float 3 and the quick-acting mechanism 5 that is configured in the seal container 2.

The main body 7 of seal container 2 is connected with lid 8 usefulness bolt (not shown), forms therein and stores the space 10 that liquid is used.In the present embodiment, the main body 7 of seal container 2 only is used to accommodate liquid basically, and the feature operated by rotary motion of present embodiment is on the lid 8 of seal container 2.

Four openings are promptly arranged on lid 8, the outlet 11 of concrete is discharging working fluid, introduce that working fluid uses be positioned at drawing front side and the inlet 13(parallel referring to Fig. 2 with outlet 11), treat the inlet 16 of force feed fluid and treat the outlet 17 of force feed fluid.

Working fluid outlet 11 among Fig. 1 and Working-fluid intaking 13 be vertical and row arrangement with respect to the surface of drawing, promptly has position relation as shown in Figure 2.Outlet valve 20 is installed in the working fluid outlet 11, and inlet valve 21 is installed in the Working-fluid intaking 13, and the above-mentioned entrance and exit valve that constitutes changing valve 120 is similar to valve shown in Figure 6.The axostylus axostyle 22 of inlet valve 21 drawn to the inside of container 2 valve body 23 is meshed with valve seat 24, thereby close Working-fluid intaking 13.Push the axostylus axostyle 25 of outlet valve 20 to working fluid outlet 11 valve body 26 is meshed with valve seat 27, thereby close working fluid outlet 11.The corresponding axostylus axostyle 25 of outlet valve 11 and inlet valve 13 is connected with 22 usefulness connecting plates 30, thereby moving up and down of connecting plate 30 cause a valve in outlet valve 20 and the inlet valve 21 to be opened, and another valve cuts out.

In Fig. 1, the parts of numbering 29 are steam deflector plate, play a part baffle plate, are used for preventing from directly to accumulate facing to fluid from the steam of inlet valve ejection the condensed fluid ejection of space 10 accumulation.

Treat that the inlet 16 of force feed fluid is positioned at the center region of lid 8 substantially, as shown in Figure 1, the outlet 17 for the treatment of the force feed fluid is arranged on the position that is equivalent to seal container 2 bottoms on the lid 8.

Float 3 is supported by a pair of clamping plate 32 by float lever 43 and fixing pin 40, and quick-acting mechanism 5 is supported clamping plate 33 by another.

Clamping plate

32 and 33 are connected to each other and are fixed on mounting screw 35 on the lid 8 of seal container 2, as shown in Figure 2.

Being used for the

fixing pin

38 and 39 of bridge joint clamping plate 32 also plays the upper and lower stopper effect of float lever 43 respectively, and in addition, fixing pin 40 is also as the swing axis of float 3.Be that float 3 swings up and down around the pin 40 that passes float lever 43.In addition, the other end of float lever 43 is fixing with connecting pin 45, and this pin 45 couples together float lever 43 and quick-acting mechanism 5.

Can see from Fig. 1 and Fig. 2, between two relative installation clamping plate 33, dispose four axis of rolling 47 and as the pin 46 of quick-acting mechanism swing fulcrum, so that make the clamping plate bridge joint.Molgogger device 48 is installed in rotation on the axis of rolling, make that sliding bar 53 is sandwiched in the middle of.Each molgogger device 48 has bump 50 at the two ends of rolling cylinder 49, as shown in Figure 3.

Quick-acting mechanism 5 comprises float lever 43, controlling rod 52, play the sliding bar 53 of valve-operating lever effect, disc spring 54 and be fastened on the

spring support

55,56 at disc spring 54 two ends.The fixing pin 46 that clamping plate 33 are installed by bridge joint in an end of controlling rod 52 is supported, it can be swung around this pin 46, and its another end is installed on the connection pin 45 of float lever 43.This just makes controlling rod 52 swing up and down round pin 45 along with the rising and the decline of float 3.In Fig. 1, the fulcrum 46 of swing arm 52 is positioned at a position near liquid inlet 16, even yet this fulcrum 46 is installed in the position than the more close float lever of sliding bar, disc spring 54 also can make controlling rod 52 deflections connect pin 45, promptly is partial to the direction that spring is upheld.

Because having sliding bar 53 its sides of square cross section (as shown in Figure 3) is sandwiched between the above-mentioned molgogger device 48 that is installed on each axis of rolling 47, so it only can move in Vertical direction.Sliding bar 53 is not limited to shown in the drawings square, and can be circular.Yet it must have such shape, and this shape is suitable for being received in the external force of the directive effect that the axial direction with sliding bar 53 intersects.

The upper end of sliding bar 53 is connected on the connecting plate 30 that connects changing valve 120.Sliding bar 53 is connected by the disc spring 54 that its two ends have

spring support

55,56 with controlling rod 52.

Disc spring 54 is configured between

spring support

55 and 56, around its core assembling.Spring support 55 near connecting pin 45 is supported by pin 75 in the position near 52 1 ends of controlling rod, and another spring support 56 is supported by pin 76 at about medium position of sliding bar 53.Therefore disc spring 54 acts on the controlling rod 52, and it is pressed on the pin 45.In addition, be inserted in spring support 55, this supporting

member

55,56 of 56(is connected on controlling rod 52 and the sliding bar 53) the disc spring 54 of axle on the core be in compressive

state.Spring support

55 and 56 has a core, and this core is connected to each other this supporting member, and this core is supported by corresponding supporting portion, and this core can be free to slide along the direction of axle core.Coupled condition at the spring support 56 of sliding bar 53 1 sides is illustrated in Fig. 4.

Dual valve

61,62 is arranged below float lever 43, and this valve can make liquid outlet 17 and fluid retention space 10 connected sums cut out.The end that the valve rod 60 of

dual valve

61,62 is housed securely is contained on the float lever 43, near pin 40, make

dual valve

61,62 can move apart valve seat separately downwards corresponding to the rising of float 3, fluid retention space 10 and liquid outlet 17 are communicated with, the decline of float 3 then makes dual valve be seated in valve seat, and dual valve closing liquid thus stores space 10 and liquid outlet 17 two-part paths.

Below by being under the situation of condensed water as working fluid with by the liquid of force feed, follow the tracks of the operation that a series of motion illustrates this device at steam under pressure.At first, Working-fluid intaking 13 is connected on the high compressed steam source, working fluid outlet 11 is connected to the steam cycle cooling plating drum.Liquid inlet 16 is connected to by safety check 18 on the steam consumption equipment of certain load or on other similar equipment, safety check 18 is suitable for breakdown and feeds fluid retention space 10 from the outside again.On the other hand, liquid outlet 17 is connected to certain used heat by safety check 19 utilizes equipment, this safety check 19 is suitable for breakdown and leads to the outside from 10 inside, fluid retention space.Usually, make the dual valve breakdown even float 3 rises, short ofly flow into steams under pressure from Working-fluid intaking 13 and make fluid retention space 10 reach pressurized state, safety check 19 can breakdown yet.

Unless the storing in the space 10 of device for feeding liquid under pressure 1 at present embodiment accumulated condensed water, otherwise float is positioned at the bottom of container.This moment, its position, the attachment portion of disc spring 54 and sliding bar 53 (pin 76) was lower than the attachment portion (pin 75) of disc spring 54 and controlling rod 52 in quick-acting mechanism 5.Therefore disc spring 54 has a down dip sliding bar 53 to the right.Be sliding bar 53 biasing force that is subjected to disc spring 54 component vertically downward effect and be pressed downward, thereby with the lower stop engagement, so it at preposition by stop.The horizontal cross component of disc spring 54 biasing forces by pin 76 effect is received by molgogger device 48.

Connect sliding bar 53 and down pulled to fluid retention space 10 to the connecting plate 30 of changing valve 120 by sliding bar 53, the inlet valve in changing valve 21 is closed thus, and outlet valve be opened (referring to Fig. 2).Because the effect of valve rod 60,

dual valve

61 and 62 rises, thus closing liquid outlet 17.

When producing condensed water in certain steam consumption equipment or in other similar devices, it is 16 influent force feed devices 1 and storing fluid retention space 10 from the liquid inlet.Owing in fluid retention space 10, accumulated condensed water, float 3 rises, at this moment, the float lever 43 that is connected to float 3 is that fulcrum is done the motion around pivot with pin 40 just, this motion makes controlling rod 52 slowly rotate around pin 46 inhour again, thereby spring support 55 is descended gradually and

dual valve

61 and 62 is opened gradually.Because sliding bar 53 is pressed onto its extreme lower position by the biasing force of disc spring 54, another spring support 56 is also made fine rotation around pin 76, but does not move.

Along with controlling rod 52 rotates around pin 46,

spring support

55 and 56 is close to each other, and the distance between

75 and 76 shortens, and disc spring 54 is subjected to bigger compression thus, thereby has accumulated the compression energy on disc spring 54.

Further rising along with float 3, controlling rod 52 is proceeded above-mentioned rotation, and a position that reaches before the quick-action action just begins is that disc spring 54 is in the position perpendicular to sliding bar 53, when float further rises a little above this position again, the attachment portion of controlling rod 52 and disc spring 54 (pin 75) just drops to the height of the attachment portion (pin 76) that is lower than sliding bar 53 and disc spring 54, thereby the upper and lower relation of the end positions of disc spring 54 reverses.Therefore sliding bar 53 is up pushed away by the vertical stress component of disc spring 54 biasing forces, and this component acts on the sliding bar by pin 76.As a result, sliding bar 53 moves up in the quick-action mode, and along with the rising that is connected to the connecting plate 30 on the sliding bar 53, inlet valve 21 is opened, and outlet valve 20 is closed.

When sliding bar 53 quick-actions, the compression pressure of disc spring 54 vertically is added on the pin 76, but does not have torque.In addition, one torque is arranged on the pin 46 of controlling rod 52, yet the controlling rod 52 from quick-acting mechanism 5 and the configuration of disc spring 54 can be seen, the pressure of disc spring 54 has disperseed, and the torque that acts on the pin 46 is also quite little, in addition, when inlet valve 21 opens and outlet valve 20 when cutting out, because the central axis of the central axis of outlet valve 20 and sliding bar 53 misplaces each other,, make the rotational of pin 76 so act on effectively on the pin 76; But because the molgogger device 48 of supporting sliding bar 53, particularly its bump 50 disperses to have received this power, decreases so prevented the eccentric wear of pin 76, has prolonged the life-span of quick-acting mechanism 5.

In the embodiment shown in fig. 1, use four molgogger devices 48 altogether, about sliding bar 53 each two.Yet the number of molgogger device 48 can carry out suitable selection according to the length of sliding bar 53 and the spring pressure of disc spring 54.In addition, molgogger device 48 also not necessarily will be configured in the left and right sides of sliding bar 53, can also only be configured in for example right side as shown in Figure 1 of sliding bar.

When Working-fluid intaking 13 is opened, high compressed steam just enters seal container 2, pressure wherein just increases, thereby the condensed water that accumulates in fluid retention space 10 just is subjected to the pressure of steam, thereby certain used heat that is transported to externally by

dual valve

61,62, liquid outlet 17 and safety check 19 utilizes equipment.As a result, the drawdown in fluid retention space 10, float 3 is subjected to the effect of self gravitation and descends.

Decline along with float 3, quick-acting mechanism 5 is ensued the programmed sequence of operations opposite with the aforesaid operations program, be that controlling rod 52 clockwise directions rotate, disc spring 54 and sliding bar 53 form the position relation that is perpendicular to one another again, in the stage that surpasses this position, sliding bar 53 moves along the direction in contrast to above-mentioned direction in the mode of quick-action, promptly moves down.

The structure of device for feeding liquid under pressure 1 shown in the drawings is that sliding bar is moved up and down, however the present invention's moving direction of limit slippage bar not, and moving direction can change arbitrarily according to the shape of seal container and the factors such as configuration of Working-fluid intaking.

Claims

1, a kind of device for feeding liquid under pressure, it comprises:

A container, this container have Working-fluid intaking, working fluid outlet, treat the force feed liquid inlet and treat the force feed liquid outlet;

A float that is configured in the said vesse;

The motion that is used to respond above-mentioned float alternately opens and closes the changing valve of Working-fluid intaking and outlet;

A linkage mechanism, comprise the valve-operating lever and the pressure spring that are connected to above-mentioned changing valve, an end of this spring is supported by above-mentioned valve-operating lever, and this spring is when operation, do not cross any fulcrum, the motion that aforementioned link mechanism responds above-mentioned float makes above-mentioned valve-operating lever move in the quick-action mode;

Above-mentioned pressure spring is supported by above-mentioned valve-operating lever, makes the force vector of above-mentioned pressure spring pass through the tie point of above-mentioned pressure spring and above-mentioned valve-operating lever.

2, device for feeding liquid under pressure as claimed in claim 1 is characterized in that, aforementioned link mechanism comprises that (ⅰ) is connected to the above-mentioned valve-operating lever of above-mentioned changing valve; (ⅱ) can be at the controlling rod of the direction swing opposite with the moving direction of above-mentioned float; (ⅲ) above-mentioned pressure spring, one end of this spring is supported on the end away from its swing fulcrum of above-mentioned controlling rod, the other end of spring is supported by above-mentioned valve-operating lever, and this spring is compressed between above-mentioned controlling rod and the above-mentioned valve-operating lever, makes above-mentioned controlling rod be in extended state.

3, device for feeding liquid under pressure as claimed in claim 1 is characterized in that, for the above-mentioned valve-operating lever of the handover operation of finishing above-mentioned changing valve is led by many guiding elements, these guiding elements have the part of the impact force that is produced when accepting the switch transition valve.